Hi ^_^ I'm working on the creation of normal maps with two mesh at different levels of detail. I've found several programms to calculate normal maps, the problem is that all these programs needs uv maps for the low model. I've my meshes obtained with laser scanner and two obj files of the two levels of details with only the points and triangles. So how can I obtain the uv coordinates for my model? I use Rhino and Blender but I'm not able to find the solution for my problem. Thank you so much Serena
uv coordinates???
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Hello, I have developed an application that renders large geometries as part of a medical visualization software. However, I ran into a weird problem. Some users report that the program comes up with a black or garbled window and none of the graphics is ever rendered. I have seen that happening on several users computers now and then and tried to debug it. However it seems that not a single function returns an error, that means I get a valid context and all OpenGL rendering is done without error, but nothing appears on the screen. This can only be fixed by restarting the X server before restarting the application. All users I believe use some version of Red Hat or Fedora and they all use the Nvidia closed source driver (but not all the same version I believe). Has anyone seen this kind of problem and can give me a hint what might be going wrong ? Thomas - 2. help on displaying wcs
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uv coordinates???
by feefolle » Thu, 15 Jun 2006 19:35:14 GMT
Re: uv coordinates???
by Wolfgang Draxinger » Thu, 15 Jun 2006 20:42:46 GMT
For parametric patches (NURBS, Bezier) the UV Coordinates uare usually the evaluator variables (in Blender those are actually named U and V). For polygonal meshes there is no general approach to get UV coordinates. But there are a few algorithms, and Blender contains one of the best currently avaliable: LSCM. You reach it by: Faceselect Mode [F-Key], select all Faces [A-Key], Unwrap-Menu [U-Key], LSCM. To work properly on closed manifolds LSCM needs you to supply seams in the model where it can safely cut the mesh. Wolfgang Draxinger --
Re: uv coordinates???
by feefolle » Thu, 15 Jun 2006 22:13:42 GMT
> For parametric patches (NURBS, Bezier) the UV Coordinates uare I will try this evening, thank you so much! Serena
Re: uv coordinates???
by Mihail » Sat, 17 Jun 2006 00:49:43 GMT
>>coordinates. But there are a few algorithms, and Blender there is a video tutorial (LSCM unwrapping with Blender) available. May be usefull, it is not so simple stuff .. http://www.**--****.com/ Mihail
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Hi ^_^ I'm working on the creation of normal maps with two mesh at different levels of detail. I've found several programms to calculate normal maps, the problem is that all these programs needs uv maps for the low model. I've my meshes obtained with laser scanner and two obj files of the two levels of details with only the points and triangles. So how can I obtain the uv coordinates for my model? I use Rhino and Blender but I'm not able to find the solution for my problem. Thank you so much Serena
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